Scraper.



T. B. FERGUSON;

SCRAPER.

APPLICATION FILED APR. 8.1913.

mama Jam. 23,1917.

2 SHEETS-SHEET 2.

'.ILHOMAS B. FERGUSON, 0F HANOBJD, CALIFORNIA.

SCAPJEE.

Specification of Letters Patent.

' atented dan.J 23, 1917..

Application led April a, 1913. Serial No. 759,723.

cavating and removing dirt, and it has particular reference to Scrapersof the type described and claimed in Letters Patent of the United StatesNo. 1,074,589, granted. to me on the 30th day of September, 1913.

A scraper of the type above referred to includes a frame structuresupported at its forward end on an axle having transporting wheels andat its rear end on a trailer wheel, said frame serving to support ascoop or scraper and means whereby the latter may be tilted and moved tovarious engaging and non-engaging positions with respect to the ground,the tilting. and moving means including .a sleeve supported for rotationon the front axle and having radial arms or cranks.

@ne object of the present invention is to dispense with the sleeve andto substitute for the straight axle an arched axle, thereby simplifyingthe construction, and also preventing the front axle from obstructingmaterial entering the scoop or scraper.

A further object of the invention isto provide simple and edectiveretaining members in the nature of hooks, normally engaging the top edgeof the back wall of the scoop and retarding or preventing its tilting toa discharging position, means being provided for quickly disengaging.the retarding members by pressure of the foot of the operator.

With' these and other ends in view which will readily appear as thenature of the invention is better understood,` the same consists intheimproved construction and novel arrangement and combination of partswhich will be hereinafter fully described and particularly pointed outin the claims.

n the accompanying drawings has been illustrated a simple and preferredform of the invention, it being, however,.understood that no` limitationis necessarily made to the precise structural details therein exhibited,but that changes, alterations and modifications within the scope of theclaims may be resorted to when desired.

1n the drawings, Figure l is a longitudinal vertical sectional view of awheeled scraper constructed 1n accordanceQ with the inventlon, andshowing the scoop in position for transportation. Fig. 2 is a similarview showing the scoop arranged for digging or scraping. Fig. 3 is asimilar viewv showing the scoop released from lthe retarding hooks andtilted. Fig. 4 is a detail plan view of the rear portion of the machine.n

Corresponding parts in the several figures are denoted by likecharacters of reference. he frame A of the machine includes side members1 that converge rearwardly and support between them a box or bearingmember 2 for a vertical shaft 3 carrying a yoke 4 which supports acaster wheel or trailer 5. The forward part of the frame' is supportedon an axle 6 having wheels 7.

Mounted on the parallel forward portions of the side members of theframe, in rear of the axle, are guides 9 of angular shapehaving slots 10wherein are guided the trunnions 14 of the scoop 12. The axle 6 isprovided intermediate the transporting wheels with an arch 15, and saidaxle is provided adjacent to the arched portion with radially extendingarms 16 which are connected with the sides 17 of the scoop by means oflinks 18, said links being pivotally connected with the side members 17near the forward edge of the scoop. Supported on the frame in rear ofthe scoop is a rock shaft 19 having radially extending arms 20 which areconnected with the sides 17 of the scoop by'means of links 21, saidlinks keepers 24 on the front cross bar 25 of the frame.

The frame A includes a cross bar 27 which is connected with the frontcross bar 25 by an arch 28 longitudinally spanning the frame. lFulcrumedon said arch near the rear'end thereof is the tilting lever 29 which isconnected by a rod 32 with one arm of a lever 33 fulcrumed on theforward part of the arch and the other arm of which is connected by alink 34 with the arched portion 15 of the axle which constitutes a crankwhereby the axle may be rocked or tilted to edect adjustment ofthe scoopthrough the medium of the arms 16 and links 18. Connected directly withthe rock shaft 19 is a lever 36 known as the unloading lever, andwhereby the shaft may be rocked or oscillated, means being providedwhereby the lever may be retained at various adjustments. A seat 40 isprovided for the driver or operator.

The cross bar 27 which is located in rear of the scoop, is provided withforwardlyl the tension of the springs 49 to place the hooks 48 inengaging position with respect to the rear wall of the scoop.

In Fig. 1 of the drawings the scoop 12 is shown in its normal positionfor transportation. By manipulating the tilting lever 29 and changingthe position thereof to that seenin Fig.- 2, the scoop will be tilted,

.throughl the medium of the arched axle and the intermediate linkconnections, until vthe forward edge thereof engages the ground and cutsinto the ground to the required depth, see Fig. 2. At the same time, theoperator by means of the treadle 50 may rock the shaft 46 against thetension of the springs 49 to place the hooks 48 in engagement with theupper edge of the rear wall of the scoop, thereby preventing excessive0r premature tilting of the latter to a discharging position. Theoperator may maintain the parts in this position by keeping his foot onthe treadle, although the strain on the scoop will usually maintain thehooks in engagement with the rear wall thereof frictionally while theWork is in progress. When a load has been accumulated, the tilting lever29 is again brought into play. to restore the scoop to the carryingposition shown in Fig. 1. When the load is to be discharged, theoperator releases the foot pressure on the treadle 50. causingr thehooks 48 to become disengaged from the scoop; the latter is then tiltedby the tilting lever until the front edge catches the ground, afterwhich the tilting operation is completed by proper manipulation of theunloading lever 36.

It willy be Seen that the arched axle is utilized as one of the scooptilting and adj usting devices, the arched portion constituting a crankwhich is connected with the operating lever by intermediate connectingmeans. The sleeve used in my previous construction and which for variousreasons 1 has been found objectionable is thus dispensed with, and anadditional advantage is gained by arching the axle, and therebypreventing said axle from obstructing material about to enter into thescoop. The retarding hooks 48 will positively obstruct the tilting ofthe scoop while in load carrying or in excavating position, but when thescoop is to be tilted for the purpose of discharging the load thetension of the springs 49. exerted following the release of the pressureof the foot of the operator on the foot piece or treadle 5() willimmediately disengage said hooks and release the scoop and permit thelatter to be tilted.

Having thus described the invention, what is claimed as new, is

1. In a machine of the class described, a main frame, an axle supportingthe forward portion of the frame, ground wheels on the axle, an arch onthe axle intermediate the ground wheels, fixed arms secured on the axleintermediatel the arch and the ground wheels, a trailer wheel supportingthe rearward portion'of the frame, a rock shaft mounted on the frame andhaving radial arms, a scoop, links connecting the forward and rearwardportions of the scoop with the fixed arms extending from the axle andthe rock shaft, respectively, means connected to the axle arch forrocking the axle, and means for rocking the rock shaft independ ently ofthe axle, also to effect adjustment of the scoop.

2. In a machine of the class described, a carrying frame, two shaftsindependently supported for rocking movement, one of said shaftsconstituting also an axle on which lsupporting wheels are mounted, fixedradial arms extending from the shafts. a scoop. links connecting thescoop with the radial arms, means for rocking the shafts to effectadjustment of the scoop, guiding means for the scoop, a third shaftsupported for rocking movement and having scoop engaging hooks, a springto withdraw the hooks from engagement with the scoop, and a treadle toactuate the rock shaft against the tension of the spring.

In testimony whereof I aiix my signature in presence of two witnesses.

THOMAS B. FERGUSON.

Witnesses:

R. L. PFEIL, W. F. KELLEY.

